Depth-adjustable gas turbine temperature and pressure detector

Abstract

The utility model discloses a depth-adjustable gas turbine temperature and pressure detector, which comprises a probe tube, and a sensor used for testing jet flow temperature or pressure is arranged at the bottom end of the probe tube. The bottom face of the base can be fixed to a gas turbine tail shell around a gas turbine tail probe hole in a sealed mode, a bottom telescopic hole corresponding to the probe hole is formed in the base, the probe tube is located in the bottom telescopic hole and can stretch out and draw back in the bottom telescopic hole, and the peripheral face of the probe tube is attached to the inner wall of the bottom telescopic hole. The adjusting mechanism is used for adjusting the probe tube to stretch out and draw back in the probe hole. The adjusting mechanism comprises a knob with a threaded hole, external threads are arranged on the periphery of the exploring tube, the knob is sleeved outside the exploring tube through matching of the threaded hole and the external threads on the periphery of the exploring tube, and the distance between the knob and the base is limited. The device has the advantages that the temperature or the pressure of jet flow at different radial positions between the tail shell of the gas turbine and the turbine shaft can be detected, more accurate test data can be obtained, and the real working conditions of the temperature and the pressure in the tail shell of the gas turbine can be reflected.

Description

Technical Field

[0001] The utility model relates to a depth-adjustable gas turbine temperature and pressure detector, belonging to the technical field of gas turbine temperature and pressure detection. Background Art

[0002] Before an aviation gas turbine is finalized and put into production, it is necessary to test the temperature and pressure of the jet in the tail casing of the tail gas turbine. The traditional method is to preset a circular hole on the tail casing of the gas turbine, set a temperature sensor or pressure sensor at one end of a tube body, and before testing, extend the end of the tube body with the sensor from the circular hole into the area between the tail casing of the gas turbine and the turbine shaft, and then seal the gap between the circular hole and the tube body by welding to prevent the high-pressure gas in the tail casing of the gas turbine from spraying out in the area between the circular hole and the tail casing of the gas turbine, and then perform the test when the gas turbine is working.

[0003] Since the tube body inserted into the circular hole is welded, the sensor located at the end of the tube body is fixed between the gas turbine tail casing and the turbine shaft during testing and cannot be radially adjusted in the gas turbine tail casing. Therefore, detection data at different radial positions in the gas turbine tail casing cannot be obtained. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to obtain the detection data of the temperature or pressure of the jet at different radial positions between the tail casing of the gas turbine and the turbine shaft.

[0005] In view of the above problems, the technical solution proposed by the utility model is:

[0006] A depth-adjustable gas turbine temperature and pressure detector comprises a probe tube, a sensor for testing jet temperature or pressure is arranged at the bottom end of the probe tube; and a base whose bottom surface can be sealed and fixed to the gas turbine tail casing around the gas turbine tail detection hole, the base is provided with a bottom telescopic hole corresponding to the detection hole, the probe tube is located in the bottom telescopic hole and can be telescoped in the bottom telescopic hole, and the outer peripheral surface of the probe tube is in contact with the inner wall of the bottom telescopic hole.

[0007] The above-mentioned temperature and pressure detector also includes an adjusting mechanism for adjusting the expansion and contraction of the probe tube in the detection hole.

[0008] The adjustment mechanism comprises a knob with a threaded hole, the outer circumference of the probe tube has external threads, the knob is sleeved outside the probe tube through the threaded hole and the external threads on the outer circumference of the probe tube, and the distance between the knob and the base is limited.

[0009] The temperature and pressure detector further comprises an upper frame, which is fixedly connected to the base. A front-to-back communicating rectangular hole is provided between the upper frame and the base, which can accommodate the knob and limit the axial movement of the knob.

[0010] The upper frame body and the base are flat bodies with left and right side widths greater than front and rear side widths, so that the front and rear sides of the knob are exposed outside the upper frame body.

[0011] The upper section of the probe tube is a square tube. The top of the upper frame body is provided with a top telescopic hole. The top telescopic hole is a square hole matched with the upper section of the probe tube. The upper section of the probe tube is located in the top telescopic hole and can slide up and down in the top telescopic hole.

[0012] The upper section of the probe tube is marked with length scale lines indicating the amount of expansion and contraction.

[0013] The upper frame body has plain bolt holes on both sides, and the base has threaded bolt holes on both sides that communicate with the plain bolt holes. The upper frame body and the base are connected and fixed by bolts through the plain bolt holes and the threaded bolt holes. Beneficial Effects

[0014] 1. It can detect the temperature or pressure of the jet at different radial positions between the tail casing of the gas turbine and the turbine shaft, obtain more accurate test data, and reflect the actual working conditions of the temperature and pressure in the tail casing of the gas turbine;

[0015] 2. Easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of the temperature and pressure detector;

[0017] Figure 2 It is a schematic cross-sectional view of the upper frame, the base and the probe tube of the temperature and pressure detector;

[0018] Figure 3 The schematic cross-sectional view is a diagram of the temperature and pressure probe being sealed and fixed on the tail casing of a gas turbine for detection.

[0019] In the figure: 100, temperature and pressure detector; 1, upper frame; 101, top telescopic hole; 102, plain bolt hole; 103, rectangular hole; 2, base; 201, bottom telescopic hole; 202, threaded bolt hole; 3, probe tube; 301, external thread; 302, length mark; 4, knob; 401, threaded hole; 5, bolt; 6, sensor; 7, gas turbine tail casing; 701, detection hole; 8, turbine shaft. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] like Figure 1 , 3As shown, a depth-adjustable gas turbine temperature and pressure probe 100 includes a probe tube 3 and a base 2 whose bottom surface can be sealed and fixed with the gas turbine tail casing 7 around the gas turbine tail detection hole 701. A sensor 6 for testing the jet temperature or pressure is placed at the bottom end of the probe tube 3. The probe tube 3 is located in the bottom telescopic hole 201 and can be telescoped in the bottom telescopic hole 201, and the outer peripheral surface of the probe tube 3 is in contact with the inner wall of the bottom telescopic hole 201. In this way, before testing the temperature and pressure in the gas turbine tail casing 7, the end of the probe tube 3 equipped with the sensor 6 is inserted into the gas turbine tail detection hole 701, and then the bottom surface of the base 2 is sealed and fixed with the gas turbine tail casing 7 around the gas turbine tail detection hole 701, and then the gas turbine is started to start the test. When it is necessary to implement the test at different radial positions between the gas turbine tail casing 7 and the turbine shaft 8, the probe tube 3 can be telescoped in the bottom telescopic hole 201 to achieve the test.

[0022] As a preferred option, the sealing and fixing method between the bottom surface of the base 2 and the gas turbine tail casing 7 around the gas turbine tail detection hole 701 is welding sealing.

[0023] like Figure 1 As shown in FIG. 3 , the gas turbine temperature and pressure probe 100 further includes an adjusting mechanism for adjusting the extension and retraction of the probe tube 3 in the detection hole 701 .

[0024] Preferably, the adjustment mechanism includes a knob 4 having a threaded hole 401, and an external thread 301 is provided on the outer periphery of the probe tube 3. The knob 4 is fitted onto the outside of the probe tube 3 through the threaded hole 401 and the external thread 301 on the outer periphery of the probe tube 3. The distance between the knob 4 and the base 2 is limited. When in use, the probe tube 3 can be extended or retracted by rotating the knob 4 forward or reversely.

[0025] The temperature and pressure detector 100 further includes an upper frame 1, which is fixedly connected to the base 2, and a front-to-back rectangular hole 103 is provided between the upper frame 1 and the base 2, which can accommodate the knob 4 and limit the axial movement of the knob 4. The upper frame 1 and the base 2 are flat bodies with a left and right width greater than a front and back width, so that the front and back sides of the knob 4 are exposed outside the upper frame 1, so that the knob 4 can be easily touched and turned by hand.

[0026] The upper section of the probe tube 3 is a square tube, and the top of the upper frame 1 has a top telescopic hole 101, which is a square hole matched with the upper section of the probe tube 3. The upper section of the probe tube 3 is located in the top telescopic hole 101 and can slide up and down in the top telescopic hole 101, but limits the rotation of the probe tube 3 around its own axis.

[0027] The upper section of the probe tube 3 is marked with a length scale line 302 indicating the amount of expansion and contraction.

[0028] The upper frame 1 has plain bolt holes 102 on both sides, and the base 2 has threaded bolt holes 202 on both sides that communicate with the plain bolt holes 102 . The upper frame and the base 2 are connected and fixed by bolts 5 through the plain bolt holes 102 and the threaded bolt holes 202 .

[0029] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.

Claims

1. A depth-adjustable gas turbine temperature and pressure probe, comprising a probe tube (3), a sensor (6) for testing jet temperature or pressure disposed at the bottom of the probe tube (3), and characterized in that: It also comprises a base (2) whose bottom surface can be sealed and fixed to the gas turbine tail casing (7) around the gas turbine tail detection hole (701), the base (2) being provided with a bottom telescopic hole (201) corresponding to the detection hole (701), the probe tube (3) being located in the bottom telescopic hole (201) and being able to telescope in the bottom telescopic hole (201), and the outer peripheral surface of the probe tube (3) being in contact with the inner wall of the bottom telescopic hole (201).

2. The depth-adjustable gas turbine temperature and pressure probe according to claim 1, characterized in that: It also includes an adjustment mechanism for adjusting the extension and retraction of the probe tube (3) in the detection hole (701).

3. The depth-adjustable gas turbine temperature and pressure probe according to claim 2 is characterized in that: The adjustment mechanism comprises a knob (4) having a threaded hole (401), the outer circumference of the probe tube (3) having an external thread (301), the knob (4) being fitted onto the outside of the probe tube (3) through the threaded hole (401) and the external thread (301) on the outer circumference of the probe tube (3), and the distance between the knob (4) and the base (2) being limited.

4. The depth-adjustable gas turbine temperature and pressure probe according to claim 3 is characterized in that: It also comprises an upper frame body (1), the upper frame body (1) being butt-jointed and fixed with the base (2), and a front-to-rear communicating rectangular hole (103) being provided between the upper frame body (1) and the base (2) and capable of accommodating the knob (4) and limiting axial movement of the knob (4).

5. The depth-adjustable gas turbine temperature and pressure probe according to claim 4 is characterized in that: The upper frame body (1) and the base (2) are flat bodies with left and right side widths greater than front and rear side widths, so that the front and rear sides of the knob (4) are exposed outside the upper frame body (1).

6. The depth-adjustable gas turbine temperature and pressure probe according to claim 4, characterized in that: The upper section of the probe tube (3) is a square tube. The top of the upper frame body (1) is provided with a top telescopic hole (101). The top telescopic hole (101) is a square hole adapted to the upper section of the probe tube (3). The upper section of the probe tube (3) is located in the top telescopic hole (101) and is capable of sliding up and down in the top telescopic hole (101).

7. The depth-adjustable gas turbine temperature and pressure probe according to claim 6, characterized in that: The upper section of the probe tube (3) is marked with a length scale line (302) indicating the amount of expansion and contraction.

8. The depth-adjustable gas turbine temperature and pressure probe according to claim 4, characterized in that: The upper frame (1) has plain bolt holes (102) on both sides, and the base (2) has threaded bolt holes (202) on both sides that communicate with the plain bolt holes (102). The upper frame and the base (2) are connected and fixed by bolts (5) via the plain bolt holes (102) and the threaded bolt holes (202).

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